Process of manufacture of articles in rubber and for their repair.



PATENTED NDV. 2G, E136.

S. Si; F RTGLS EN RUBBER AND FR. HBIR REPAR.

PRGESS OF MANUPAGTURE 2 SHEETS-ESE? 14 2 mmamxmmmm No. ass-83. Y Y jPATENTS?) Nov. 2Q, ms,

' A. s. BGWLBY. Y PRocBss @F MNPAUTURB 0F ARTIGLES m RUBBER ,um FURTHEIR mmm.

PPLGATIOR FILED JENE 39, 1965.

E SHEETS-SHEET 2V ums hun m, zum hmmm n L lio inoval from the wheel, andFig. 7 shows any applieation of the process to thc repair of the so e ofa boot.

In Fig. 1 there is slidin p iston b, to' w b an piston-head b3, therebeing interposed between a and b a helical spring c, which cup c, fittedwith a i tends to force the piston b to the inner end l liquid andapplied to the L required to be produced is tem oraril P ofthe cup. Therim of the cup a is adapted to lit into a recess formed in a second cud, which contains a die-plate e, whose su ace carries the negative o thepattern required to be produced. The required pressure is effected by*meansof a press consisting of a base-plate an arch g, andscrcw h.

A sufficient quantity of the rubber frag-` ments to reduce the requiredarticle are inserted eit ier in the cup d or cup a, or in both, andimmediately after wetting the masswith the vulcanizing liquid pressureis applied by means of th tained by means of the interposed spring c.

A convenie' t form and method of production of the ru l ber fragments isthat of threads produced by c 4tting .up thin rubber sheeting. A mass olsuchl thread-shaped fragments can be sustained within the cu a by meansof two or more rubber ban s made of the threads, which bands arestretched over the up er surface of the cu Vand beneath the ho low. Thecup containing such a mass can be dipped into a vessel `of thevulcanizing die without delay.

44Referring next to Fig. 2, -i' is a chamber into which the semiliquidmass of fra ments of rubber or rubber compound and vu caniz ing andiiuxin liquid is adapted to be forced from the cham er y of ascrew-press. From the chamber 'i'. ari-annular escapepassage 1c isprovided frmed between a'ii'external die-tube m and an internaldie-tuberi. The tube m is secured to the bottom of the chamber 'i'. bymeans of a nut o, and the internal die-tube n is secured to the cover ofthe chamber fi in such a manner as to be truly concentric with the tubem. To insure this result, a short length of metal tubing of the samediameter an thickness as that of the rubber tubing interosed between thelower en s oft e dietubes m and 1i previously to tightening the to theAcham er and its cover, respectively. This .tubular distancepieceisleftin lace to be thrust'out by the squirted tube o -rubber,"after whichthe preceding ortion ture w l serve to lmaintain the die-tubesconnection of each truly concentric `with one-another. When start' theoperation, the airin the chamr-bers is evacuated. throughlthe 4orificep, I

v'be maintained b ich is secured the rod e screw h, a pressure beingmain-` of the tube under manufacwhich is afterward closed by the cap q.Continuity in carrying ou't the process may providing a feeding vesselr, into which a ditional material is placed and drawn into the chamber jof the screwpress bv reversing the movement of its pison. of dividedrubber and vulcanizing liquid 1 stop-cock s is closed. To moreeiectually keep u the continuity of flow, the screwpress s'iown can beduplicated. The effect of n iixing the fragments of rubber with thefluxmv and yulcanizirig liquor and iorcing the mixture through theannular assage between the die-.tubes 1n and n will e to cause it toconsolidate and form 4a continuous seamless tube. The tube. of rubberwill emerge from the spaee'between the die-tubes in. a somewhat stickycondition in company with bisulfid of carbon or other solvent. For thepurpose of removing the solvent from the interior of the tube a currentof warm air is introduced by the pipe t and permitted to escape througha constricted openin'g in the plug uofa stopper v at such a rate as tokeep the rubber tu e under manufacture from collapsing, and the streamof air may convey chalk or other suitable dust to destroy the stickycondition of the interior surface of the tube. By means of a suitablmodified form of this apparatus inwhich tlie interior die-tube n isomitted threads of rubber may be` manufactured of 4any transversesection by the process of extrusion.

Reference is next made to Figs. 3 and 4, wherein is shown a. sim le formof mold for consolidating avmass of y 'videdrubber under i pressure intoa globularsha e; but the proc` ess herein exemplified may e applied tothe production in rubber or rubber compounds of an object of any desiredconfiguration.`

To permit of the removal of the mo ded article, the mold is made in twose arable halves which are united by screw-bo ts w w. The halves arecaused to register together by means of acentering-ring ic, formed onone and a corresponda recess formed in the other. The materia isintroduced by means of a screw-press like that shown in Figo2, andpreferably, but not necessarily, m below u warl the air `being allowedto escape t rough an orifice which is subse quently close by escrow-plugy.'

The remaining figures refer to means for permanently filling cavities.

In .5and7,asinFig.1,thereisacup a, fit with asliding piston l, to whichis secured the rod b' solid rods or Iand Vpiston-rod head b.

reviously to taking in a fresh charger IOC iso

there being inte 'osedv between a and b'a helicalrsp cw tends to forcethe pigi ton b'to the 'inner end of the cup. `There is also providedcome convenient form opress whereby with a screw or otherwise a ressuremay be applied to force the cupi'an the 35 Y o' lief oups efeer-responding eines end sispes ere eesese piston contained thereinagainst tbe surface l v Whieb is required te be repaired by filling theVcommes or cuts which it may oontsin.

nrEig. 5 the press comprises sill erehrgefrhe" A two ebutrnent's ofWhieh ere adapted to be fastened te the :rim of the wheel by the Y'straps g g', e thumb-screw k being fitted et the center of the eren. Thesurface to be mended been cleansed and prepared, as before deserrbed,andthe eren strapped to v the Whee in the suitable osition, the eup e;

detached from sire press, is fed with rubber Y fragments, end rnmedisteyafter wetting the fragments with the vneenizing iquid` the nioutb of thesnp is e plied to the 'wound end Y the pressure epped y rneens of thethumbserew, There-Koerse bisuiid will @one et; the

oints er be temporarily absorbed by the snr'- Y rnass is obtained by thecombined e'eors of Y f Ieleirn-T the deeotion of the bottom of the en'ewerd the meterie to be repaired en the eastie deformation of themateriel which becomes temporery squeezed inte the esp. To'permit of thestopping and riding eertiee of serions sizes and shapesg e seriesprovided.

1. A recess for obtaining e concrete mess of conso ldatedvulcanized-rubber'oompound,

in which rubber is reduced to fragments of 'which esuffeient quantityfor the purpose is wetted with e vuoenzing iqud and forced intopressureeonteet. v

2. A process for ebtsimng s concrete mess of vulcanized-rubber eornpoundeonsoideted ee eregniredeengnretion, in which rubber 1sredueedlsorsgrnents, of which s. suelent quentityfor'fihe purpose iswetted with e vueenizingfiqind Ysnr-drforced into pressure i'eontesefeVV Y Y Y I Y Y i 3.V A recess for obtaining s concrete mess ofsenso delted vnlesnsedeubber compound in which rubber isV reduced tofragments ei which a sueient quantity for the purpose is wettedwiigh nvuloanizing liquid end forced Y irggpressnreleentset by eonstreintwithin e eerie?. i '4. A of vueenized-rnbber compound eonsolideedYsegsreqnired conguretion, in which rubber 1s redeeelY ino fragments ofwhich sstnueient for the purpose is Weted e g quid end forced insepressureeonisee sie eepstreint Within s esvty.

5. A preeessfer obeinng e eener-ete mess YofY rneenieedrubber compoundeonsoideted nreigniredveongnreen, in whieh rubber rs r nes-ditoVfragments of which e sueient rnnnntijr'for'the purpose is wetted with ereeenizing Iiquid end foreed into constraint siennes esvity whoseboundary, with which the rubber fragments make terminal contest,determines the eonV ration effected end maintained under enestieellynpplied pressure. Y

6. .A process forebtsning s concrete mass Yof eonsoideeedveeenized-rubber eernfeennd to ermsnently essere? eY eevty, in which rnber is redeeedVV ee fragments, of Whiehe ssiieieneqnnntityfor the per oseis wetted with s vnlesniningiqnid and porsrilyanppied esstio pressuret'n'tesriinony whereof 1 have signed my' neme to tbisspeeieetion in thepressure of two subsorfbmg witnesses,

ARTHUR SYDNEY BOWLEY.

Witnesses inosres ALFRED HEARSUN,

Nemen J. SKERTEN.

process for obtaining e concrete :mess l i n eroe-d into tbe f cavityand meintsined ther-ern under s. isern-Y

